diff --git a/.forgejo/workflows/push.yaml b/.forgejo/workflows/push.yaml
index fe94b45..f37231b 100644
--- a/.forgejo/workflows/push.yaml
+++ b/.forgejo/workflows/push.yaml
@@ -18,6 +18,9 @@ jobs:
       - uses: https://github.com/cachix/install-nix-action@v29
         with:
           nix_path: nixpkgs=channel:nixos-unstable
+          extra_nix_config: |
+            trusted-public-keys = skynet-cache:zMFLzcRZPhUpjXUy8SF8Cf7KGAZwo98SKrzeXvdWABo= hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ= cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=
+            substituters = https://nix-cache.skynet.ie/skynet-cache https://hydra.iohk.io https://cache.nixos.org/
       - run: nix --version
       # get the repo first
       - uses: https://code.forgejo.org/actions/checkout@v4